FuelCell Energy, Inc.
HIGH EFFICIENCY FUEL CELL SYSTEM WITH INTERMEDIATE CO2 RECOVERY SYSTEM

Abstract:

A high efficiency fuel cell system includes a topping fuel cell assembly including a topping cathode portion and a topping anode portion; a carbon dioxide separation unit that receives at least a portion of an anode exhaust stream output from the topping anode portion and separates the portion of the anode exhaust stream into a carbon dioxide stream and a carbon dioxide depleted stream; and a bottoming fuel cell assembly including a bottoming cathode portion and a bottoming anode portion. The bottoming anode portion receives the carbon dioxide depleted stream output from the carbon dioxide separation unit. The carbon dioxide depleted stream being richer in hydrogen than the portion of the anode exhaust stream output from the topping anode portion.